UK electricity prices remain among the highest in Europe, with medium-use households paying the fourth-highest rates in the second half of 2025, according to the BBC. The UK government has announced a cut in VAT on domestic electricity from 5% to zero starting October 2026 to ease the burden, but structural factors continue to keep wholesale and retail costs elevated.
Wholesale Gas Sets the Marginal Price
The BBC explains that the wholesale electricity price is determined by the last unit of generation needed to meet demand — an auction system where gas-fired plants often submit the highest bid. Even when gas accounts for as little as 1% of generation at a given time, it can set the overall price paid to all generators. Gas generators face two cost disadvantages: they must purchase fuel, and they pay a ‘carbon price’ for emissions. The wars in Iran and Ukraine have pushed gas costs higher, further inflating UK electricity bills.
Energy Mix Comparison Hurts the UK
| Country | Share of electricity from natural gas (2025) | Share from nuclear (2025) |
|---|---|---|
| UK | 31% | Not specified |
| France | 3% | 69% |
| US | 40% | Not specified |
The BBC notes that the UK generates a relatively high 31% of its electricity from natural gas, compared to just 3% in France, which relies heavily on nuclear (69%). While the US has an even higher gas share (40%), American wholesale gas prices are far lower due to the shale gas production boom of the past 20 years.
Grid Infrastructure Investment Adds to Bills
Network costs — state subsidies for wind and solar farm construction and electricity grid modernisation — have also raised household bills in recent years, the BBC reports. The wholesale energy cost component of a typical Great Britain household bill rose from £311 in 2024-25 to £320 in 2025-26. These network costs reflect the need to expand and upgrade the grid to accommodate more renewable generation.
Implications for Commodity Markets
The analysis underscores the enduring link between natural gas prices and UK electricity costs. For traders and procurement teams, the UK’s reliance on gas-fired marginal pricing means any supply disruption or price spike in global gas markets will immediately feed through to power costs. The planned VAT cut will not alter wholesale dynamics. With gas storage levels, geopolitical tensions, and carbon pricing all in play, UK electricity prices are likely to remain at a premium to continental peers.
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